3.1801.2 Sealing and Insulating Exterior Roof Access Panels and Hatches

Topic: 
Roofs
Subtopic: 
Roof Decks, Panels, and Hatches
Desired Outcome: 
Roof access is operable, airtight, weathertight, and properly insulated
For supporting material, see Referenced Standards.
TitleSpecification(s)Objective(s)
3.1801.2a
Worker safety

All worker safety specifications will be in accordance with SWS 2.0100.3 Worker Safety

Ensure worker safety, especially in regard to fall protection considerations and contaminants found in demolition, such as asbestos, lead, polychlorinated biphenyls, etc.

3.1801.2b
Occupant safety

Occupant will be notified of changes or repairs to be made

An occupant safety plan will be prepared and implemented

Ensure occupant safety

3.1801.2c
Pre-inspection

Location of air and thermal boundary Thermal boundary The separation between the interior and exterior environments of a building that slows heat flow will be identified in the attic, and it will be determined if roof access intersects that boundary

Roof access will be inspected for air and water leakage, warping, stability, holes, proper operation, and security

When the roof access cannot be repaired, the roof access will be recommended for replacement

The roof access will be watertight

If roof access is part of the air and thermal boundary Thermal boundary The separation between the interior and exterior environments of a building that slows heat flow , then it will be airtight and insulated

Determine the scope of roof access repair

Ensure correct plan of work is selected to maintain the air and thermal boundary Thermal boundary The separation between the interior and exterior environments of a building that slows heat flow

3.1801.2d
Roof access operation and fit

Roof access will be adjusted or repaired to properly fit the curb/jamb and allow for ease of operation (e.g., hardware adjustment and/or replacement)

Ensure proper operation of the roof access system

3.1801.2e
Sealant selection

Sealants will be compatible with their intended surfaces and applied in accordance with manufacturer specifications

Selection will be durable, pest resistant, and have a weather-appropriate seal

Indoor sealants will be low volatile organic compound ( VOC VOC Volatile organic compound ) products that meet independent testing and verification protocols, such as Green Seal GS-36, "GREENGUARD Children and Schools," or comparable certifications

Fire-resistance-rated assemblies will be provided with sealants permitted by the authority having jurisdiction and adopted building code

Prevent intrusion of moisture and pests into the sealed assembly

Prevent exposing workers or occupants to excessive VOC VOC Volatile organic compound levels

Ensure sealant meets or exceeds the performance characteristics of the assembly and is compliant with local fire code requirements

3.1801.2f
Frame/curb sealing

Roof access frame/curb will be sealed to both the exterior and interior side of the roof/wall to prevent water and air intrusion

Roof access stop will be sealed to frame/curb

When the existing frame/curb has penetrations due to old hardware, the abandoned penetrations will be sealed

Ensure the roof access frame/curb is air and watertight

3.1801.2g
Weather stripping

Appropriate weather stripping materials will be used

Durable weather stripping material will be sized to span irregularities in the frame/curb, as well as seasonal variations

Weather stripping will be installed around all four sides of the roof access

Mechanically installed weather stripping carrier will be sealed to surface

Roof access will be tested for ease of operation and airtightness after weather stripping is installed

Make an airtight and watertight seal while maintaining the operation of the roof access

Ensure hatch and door is airtight to allow for seasonal variation

Ensure roof access operates properly after weather stripping is installed

3.1801.2h
Insulation

Access hatches will be insulated with noncompressible insulation to an R-value sufficient to prevent condensation on either the conditioned or unconditioned side, based on local climate conditions

Hatch curb will be durably insulated where feasible

When access hatches are part of a fire-resistance-rated assembly or are used for smoke or heat removal, added materials will not be permitted

When new hatch and flashing is installed, exterior insulation will be added to the curb

If the rough opening size allows, interior curb insulation will be installed

Achieve uniform R-value on the roof access sufficient to prevent condensation

3.1801.2i
Quality assurance

Roof access will be adjusted to properly fit the jamb and allow for ease of operation and security

Roof access system will be tested for air leakage in accordance with ASTM ASTM ASTM International, www.astm.org E1186 (smoke pencil, theatrical fog, or infrared)

Ensure proper operation of the roof access and hardware

Prevent air leakage through assembly